London attack: British MP ‘metres away’ from Westminster attacker as gunshot rang out

British MP David Davies was just metres away from an attacker as authorities shot him dead in UK Parliament in London overnight.

Mr Davies, 46, a member of the British Conservative Party, was at Portcullis House in Westminster with colleagues when a terrorist mowed down dozens of people on Westminster Bridge before fatally stabbing a police officer, just metres from where Mr Davies stood.

Mr Davies explained to 9NEWS this morning that he and a few others were walking through Westminster to a vote when they heard the attack.